document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=618306>Question 618306</A>: <I><SPAN STYLE=\"word-break: break-all;\"> x^2+y^2+6x-8y-155=0<BR>\n" );
document.write( "Find the radius and the center of the circle. For the radius use radicals as needed for an exact answer. For the center type in an ordered pair using fractions and integers as needed. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #388810 by </B><A HREF=/tutors/aboutme.mpl?userid=lwsshak3><B>lwsshak3(11628)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=lwsshak3><IMG SRC=http://www.algebra.com/images/aboutme-small.gif BORDER=0 alt=\"About Me\" VALIGN=MIDDLE></A>&nbsp;<IMG SRC=http://www.algebra.com/images/nopicture.jpg><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=388810\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Find the radius and the center of the circle.<BR>\n" );
document.write( "Equation of a circle:(x-h)^2+(y-k)^2=r^2, (h,k)=(x,y) coordinates of center, r=radius<BR>\n" );
document.write( "x^2+y^2+6x-8y-155=0<BR>\n" );
document.write( "complete the squares<BR>\n" );
document.write( "x^2+6x+y^2-8y-155=0<BR>\n" );
document.write( "(x^2+6x+9)+(y^2-8y+16)=155+9+16<BR>\n" );
document.write( "(x+3)^2+(y-4)^2=180<BR>\n" );
document.write( "center: (-3,4)<BR>\n" );
document.write( "radius &#8730;180\r<BR>\n" );
document.write( "\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );